alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET RETIRED Crashedtech Loader CnC Checkin"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/addnew.php"; fast_pattern; bsize:11; http.request_body; content:"username="; content:"windows=Windows|2b|"; content:"client=client"; content:"ip="; reference:url,medium.com/@lcam/updates-from-the-maas-new-threats-delivered-through-nullmixer-d45defc260d1; classtype:trojan-activity; sid:2044853; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_03_31, deployment Perimeter, deployment SSLDecrypt, former_category MALWARE, malware_family Crashedtech_Loader, performance_impact Low, confidence High, signature_severity Major, tag Crashedtech_Loader, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_09_30, reviewed_at 2024_09_30; target:src_ip;)